Self-scattering of inflaton during inflation

Abstract: Inflationary models predicting a scale-dependent large amplification of the density perturbations have recently attracted a lot of attention because the amplified perturbations can seed a sizable amount of primordial black holes and stochastic background of gravitational waves. While power spectra in these models are often computed ignoring the inflaton self-scattering, the self-scattering (or loop correction) is generally non-negligible in such inflation models with large amplification of perturbations. In this talk, I will highlight what changes and remains unchanged by inflaton self-scattering during inflation. References: arXiv:2211.02586, 2403.04682, 2403.12811, 2502.08707, and 2502.12112

HEP - phenomenologyHEP - theorymathematical physics

Audience: researchers in the topic

NHETC Seminar

Series comments: Description: Weekly research seminar of the NHETC at Rutgers University

Livestream link is available on the webpage.